Effect of oxygen-containing species on the impedance of the Pt/ YSZ interface

Seetharaman Sridhar; Victor Stancovski; Uday B. Pal

doi:10.1016/s0167-2738(97)00322-6

Effect of oxygen-containing species on the impedance of the Pt/ YSZ interface

Seetharaman Sridhar, Victor Stancovski, Uday B. Pal

Research output: Contribution to journal › Article › peer-review

33 Scopus citations

Abstract

The modifications induced by oxygen on the impedance spectra of Pt/YSZ (platinum/yttria-stabilized zirconia) interfaces at 900°C have been studied. Oxygen atmosphere and oxygen transfer utilizing both positive and negative direct currents influenced the concentration of oxygen-containing species (OCS) at the interface and that is shown to affect the shape of the impedance response. Two main types of OCS have been identified. The effect of chemical stripping of the OCS by utilizing a reducing CO-CO₂ atmosphere was also investigated. A mechanism for oxygen transfer across the Pt/YSZ interface is suggested. It involves two parallel paths: direct, fast interfacial transfer of the O^2- and a slow path, wherein the OCS participate.

Original language	English (US)
Pages (from-to)	17-22
Number of pages	6
Journal	Solid State Ionics
Volume	100
Issue number	1-2
DOIs	https://doi.org/10.1016/s0167-2738(97)00322-6
State	Published - Sep 1997
Externally published	Yes

Keywords

Current
Interface
Oxygen-species
Platinum
Polarization
Zirconia

ASJC Scopus subject areas

Chemistry(all)
Materials Science(all)
Condensed Matter Physics

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10.1016/s0167-2738(97)00322-6

Cite this

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title = "Effect of oxygen-containing species on the impedance of the Pt/ YSZ interface",

abstract = "The modifications induced by oxygen on the impedance spectra of Pt/YSZ (platinum/yttria-stabilized zirconia) interfaces at 900°C have been studied. Oxygen atmosphere and oxygen transfer utilizing both positive and negative direct currents influenced the concentration of oxygen-containing species (OCS) at the interface and that is shown to affect the shape of the impedance response. Two main types of OCS have been identified. The effect of chemical stripping of the OCS by utilizing a reducing CO-CO2 atmosphere was also investigated. A mechanism for oxygen transfer across the Pt/YSZ interface is suggested. It involves two parallel paths: direct, fast interfacial transfer of the O2- and a slow path, wherein the OCS participate.",

keywords = "Current, Interface, Oxygen-species, Platinum, Polarization, Zirconia",

author = "Seetharaman Sridhar and Victor Stancovski and Pal, {Uday B.}",

note = "Funding Information: Pt Path0 edged. The authors wish to thank Prof. H.L. Tuller Financial support by EPRI is gratefully acknowl- for valuable discussions.",

year = "1997",

month = sep,

doi = "10.1016/s0167-2738(97)00322-6",

language = "English (US)",

volume = "100",

pages = "17--22",

journal = "Solid State Ionics",

issn = "0167-2738",

publisher = "Elsevier",

number = "1-2",

}

TY - JOUR

T1 - Effect of oxygen-containing species on the impedance of the Pt/ YSZ interface

AU - Sridhar, Seetharaman

AU - Stancovski, Victor

AU - Pal, Uday B.

N1 - Funding Information: Pt Path0 edged. The authors wish to thank Prof. H.L. Tuller Financial support by EPRI is gratefully acknowl- for valuable discussions.

PY - 1997/9

Y1 - 1997/9

N2 - The modifications induced by oxygen on the impedance spectra of Pt/YSZ (platinum/yttria-stabilized zirconia) interfaces at 900°C have been studied. Oxygen atmosphere and oxygen transfer utilizing both positive and negative direct currents influenced the concentration of oxygen-containing species (OCS) at the interface and that is shown to affect the shape of the impedance response. Two main types of OCS have been identified. The effect of chemical stripping of the OCS by utilizing a reducing CO-CO2 atmosphere was also investigated. A mechanism for oxygen transfer across the Pt/YSZ interface is suggested. It involves two parallel paths: direct, fast interfacial transfer of the O2- and a slow path, wherein the OCS participate.

AB - The modifications induced by oxygen on the impedance spectra of Pt/YSZ (platinum/yttria-stabilized zirconia) interfaces at 900°C have been studied. Oxygen atmosphere and oxygen transfer utilizing both positive and negative direct currents influenced the concentration of oxygen-containing species (OCS) at the interface and that is shown to affect the shape of the impedance response. Two main types of OCS have been identified. The effect of chemical stripping of the OCS by utilizing a reducing CO-CO2 atmosphere was also investigated. A mechanism for oxygen transfer across the Pt/YSZ interface is suggested. It involves two parallel paths: direct, fast interfacial transfer of the O2- and a slow path, wherein the OCS participate.

KW - Current

KW - Interface

KW - Oxygen-species

KW - Platinum

KW - Polarization

KW - Zirconia

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U2 - 10.1016/s0167-2738(97)00322-6

DO - 10.1016/s0167-2738(97)00322-6

M3 - Article

AN - SCOPUS:0031235107

SN - 0167-2738

VL - 100

SP - 17

EP - 22

JO - Solid State Ionics

JF - Solid State Ionics

IS - 1-2

ER -

Effect of oxygen-containing species on the impedance of the Pt/ YSZ interface

Abstract

Keywords

ASJC Scopus subject areas

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